00:01
There is given a normal distribution for this question.
00:03
Let me take notes what's given here.
00:05
So the mean is given here, which is denoted by mu.
00:08
This is 6 .07 ohms.
00:10
And the standard deviation denoted by sigma, which is 0 .13.
00:14
So i can define the random variable x, normally distributed, and the mean, and the standard deviation.
00:21
And the sample size is also given here.
00:23
So the sample size is 41.
00:25
So what we need to find? we need to find the sample standard deviation.
00:29
Let's denote the sample standard deviation by the sigma x bar, which is equal to the population standard deviation and divided by square root of the sample size.
00:38
Let's say the population standard deviation is 0 .13 divided by square root of the sample size 41.
00:44
So i can define the random variable x bar for the sample, which is normally distributed.
00:48
So the sample mean and the population mean are equal to each other...